:root{--primary:#0f4c81;--secondary:#f6b042;--text:#333;--muted:#6b7280;font-size:16px}*{box-sizing:border-box}body{margin:0;font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;color:var(--text);background:#f4f6fb}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}#header-placeholder{min-height:100px;display:block;opacity:0;transition:opacity 0.3s ease}#footer-placeholder{min-height:150px;display:block;opacity:0;transition:opacity 0.3s ease}#contact-placeholder{min-height:400px;display:block;opacity:0;transition:opacity 0.3s ease}header{background:var(--primary);color:white;padding:1.5rem 1rem;position:sticky;top:0;z-index:10}.header-inner{max-width:960px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:1.5rem}.header-logo{display:flex;align-items:center;gap:1rem}.committee-logo{height:50px;width:auto;border-radius:0.25rem}.site-title{margin:0;font-size:1.75rem;letter-spacing:0.04em}nav ul{display:flex;gap:1rem;margin:0;padding:0;list-style:none;font-weight:600}nav a{color:white;padding:0.25rem 0.5rem;border-radius:0.5rem;transition:background 0.2s ease}nav a:hover,nav a:focus{background:rgba(255,255,255,0.2)}main{max-width:960px;margin:0 auto;padding:2rem 1.5rem 4rem;min-height:600px;contain:layout}.hero{background:linear-gradient(135deg,#fff 0%,#f0f7ff 100%);border-radius:1.25rem;padding:2.5rem;box-shadow:0 20px 40px rgba(15,76,129,0.1);margin-bottom:2.5rem}.hero.hero-with-image{display:flex;gap:2rem;align-items:center}.hero-visual{flex:1;max-width:400px;min-height:400px}.hero-content{flex:1;min-height:300px}.main-visual{width:100%;height:auto;border-radius:0.75rem;box-shadow:0 8px 16px rgba(15,76,129,0.15);display:block}.hero h1{margin-top:0;font-size:2.2rem;color:var(--primary)}.section h1,.section>h1,section h1{font-size:2rem !important;margin:0 0 1rem 0}.hero p{font-size:1.1rem;line-height:1.8}.section{background:white;border-radius:1rem;padding:1.75rem;box-shadow:0 12px 24px rgba(15,76,129,0.08);margin-bottom:2rem}.section h2{margin-top:0;border-left:0.35rem solid var(--secondary);padding-left:0.75rem;font-size:1.6rem}.grid-2{display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.grid-2 img{width:100%;height:auto;max-width:100%;border-radius:0.5rem;box-shadow:0 4px 8px rgba(15,76,129,0.1)}.badge{display:inline-flex;align-items:center;gap:0.5rem;background:#fff3d7;color:#7a4d00;border-radius:999px;padding:0.4rem 1rem;font-weight:600;margin-bottom:1rem}.event-info{margin-bottom:1rem}.countdown-section{text-align:center;background:linear-gradient(135deg,var(--primary) 0%,#2563eb 100%);color:white;margin-bottom:2.5rem;padding:3rem 2rem}.countdown-display{font-size:2.5rem;font-weight:700;text-align:center;line-height:1.2;text-shadow:0 2px 4px rgba(0,0,0,0.3);letter-spacing:0.02em;margin:0;padding:1rem;background:rgba(255,255,255,0.1);border-radius:1rem;backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,0.2)}.countdown-number{font-weight:800;font-size:1em}.countdown-unit{font-size:0.6em;font-weight:500;margin-right:0.5em;opacity:0.9}.date-info{display:flex;align-items:center;gap:0.75rem;margin-top:0.5rem;margin-bottom:1rem}.date-badge{display:inline-flex;align-items:center;background:var(--secondary);color:#000;border-radius:999px;padding:0.3rem 0.8rem;font-weight:700;font-size:0.9rem}.date-text{font-size:1.1rem;font-weight:600;color:var(--primary)}.venue-info{display:grid;grid-template-columns:1fr 1fr;gap:2rem}.venue-details h3,.access-info h3{margin-top:0;color:var(--primary);font-size:1.2rem}.map-container{margin-top:1rem;min-height:350px}.map-container iframe{width:100%;border-radius:0.5rem;box-shadow:0 4px 8px rgba(15,76,129,0.1)}.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem;margin-top:1rem}.contact-card{background:#f9fafc;border:1px solid #e0e7ff;border-radius:0.85rem;padding:1rem;box-shadow:0 8px 16px rgba(15,76,129,0.04)}.contact-card h3{margin-top:0;font-size:1.1rem}dl{margin:0}dl + dl{margin-top:1.25rem}dt{font-weight:600;color:var(--muted)}dd{margin:0.25rem 0 0.75rem 0}footer{background:#0b3054;color:white;padding:3rem 1rem 1.5rem}.footer-content{max-width:960px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:2rem;text-align:left}.footer-section h3{margin:0 0 1rem 0;font-size:1.1rem;color:var(--secondary);border-bottom:2px solid var(--secondary);padding-bottom:0.5rem}.footer-section p{margin:0.5rem 0;color:#e0e7ff;line-height:1.6}.footer-nav{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:0.5rem}.footer-nav li{margin:0}.footer-nav a{color:#e0e7ff;text-decoration:none;transition:color 0.2s ease;display:inline-block;position:relative}.footer-nav a:hover{color:var(--secondary);text-decoration:none}.footer-nav a::before{content:'▶ ';font-size:0.7rem;margin-right:0.5rem;opacity:0;transition:opacity 0.2s ease}.footer-nav a:hover::before{opacity:1}.footer-bottom{border-top:1px solid rgba(255,255,255,0.2);padding-top:1.5rem;text-align:center;max-width:960px;margin:0 auto}.footer-bottom p{margin:0.25rem 0;color:#cbd5e1;font-size:0.9rem}.button{display:inline-flex;align-items:center;gap:0.5rem;background:var(--primary);color:white;padding:0.65rem 1.25rem;border-radius:999px;font-weight:600;transition:transform 0.2s ease,box-shadow 0.2s ease}.button:hover{transform:translateY(-2px);box-shadow:0 10px 18px rgba(15,76,129,0.2);text-decoration:none}.button-primary{background:linear-gradient(135deg,var(--primary) 0%,#0a4d8f 100%);font-size:1.05rem;padding:0.75rem 1.5rem;box-shadow:0 4px 12px rgba(15,76,129,0.25)}.button-primary:hover{box-shadow:0 8px 20px rgba(15,76,129,0.35)}.notice-list{display:grid;gap:1rem}.notice-item{background:#f9fafc;border-left:0.4rem solid var(--primary);border-radius:0.75rem;padding:1rem 1.25rem;box-shadow:0 10px 20px rgba(15,76,129,0.06)}.notice-item h3{margin:0;font-size:1.1rem;display:flex;flex-direction:column;gap:0.25rem}.notice-date{font-size:0.85rem;font-weight:500;color:var(--muted);background:#e0e7ff;padding:0.2rem 0.6rem;border-radius:0.4rem;display:inline-block;width:fit-content}.notice-title{font-size:1.15rem;font-weight:600;color:var(--primary);margin-top:0.3rem}.notice-item p{margin:0.75rem 0 0;line-height:1.7}.notice-item.with-image{display:flex;gap:1.5rem;align-items:center}.notice-content{flex:1}.notice-image{flex:0 0 200px}.notice-image img{width:100%;height:auto;border-radius:0.5rem;box-shadow:0 4px 8px rgba(15,76,129,0.1)}.external-links{display:grid;gap:1rem;margin-top:1rem}.external-links a{display:block;padding:0.85rem 1rem;border-radius:0.75rem;border:1px solid #dbeafe;background:#f1f7ff;font-weight:600;transition:transform 0.2s ease}.external-links a:hover{transform:translateY(-2px);text-decoration:none}.notice-alert{border-radius:1rem;padding:2rem;margin-bottom:2rem;box-shadow:0 8px 16px rgba(0,0,0,0.08)}.notice-alert-warning{background:linear-gradient(135deg,#fff5f5 0%,#fee2e2 100%);border:2px solid #fca5a5}.notice-alert-header{display:flex;align-items:center;gap:0.75rem;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:2px solid #fca5a5}.notice-alert-icon{font-size:2rem;filter:drop-shadow(0 2px 4px rgba(0,0,0,0.1))}.notice-alert-header h2{margin:0;padding:0;border:none;color:#991b1b;font-size:1.5rem}.notice-alert-content p{line-height:1.8;margin:0.75rem 0;color:#450a0a}.notice-alert-content p strong{color:#991b1b;font-weight:700}.notice-alert-action{margin:1.5rem 0;text-align:center}.notice-alert-action .button{background:linear-gradient(135deg,#dc2626 0%,#991b1b 100%);color:white;padding:0.85rem 2rem;font-size:1.05rem;box-shadow:0 4px 12px rgba(220,38,38,0.3)}.notice-alert-action .button:hover{background:linear-gradient(135deg,#b91c1c 0%,#7f1d1d 100%);box-shadow:0 6px 16px rgba(220,38,38,0.4)}.notice-alert-footer{margin-top:1.5rem;padding-top:1rem;border-top:1px solid #fca5a5;font-style:italic;color:#7f1d1d}.notice-alert-signature{text-align:right;font-weight:600;color:#991b1b;margin-top:0.5rem}.tagline{margin:1rem 0 0;font-size:1.1rem;color:var(--muted)}.sns-section{text-align:center;margin-bottom:2rem}.sns-links{display:flex;justify-content:center;gap:1.5rem;margin-top:1rem}.sns-link{display:inline-flex;align-items:center;gap:0.5rem;padding:0.75rem 1.5rem;border-radius:999px;font-weight:600;transition:all 0.2s ease;text-decoration:none;color:white;box-shadow:0 4px 12px rgba(0,0,0,0.15)}.sns-link:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,0.25);text-decoration:none}.sns-link.x{background:linear-gradient(135deg,#000000 0%,#1a1a1a 100%);border:1px solid #333333}.sns-link.x:hover{background:linear-gradient(135deg,#1a1a1a 0%,#333333 100%)}.sns-link.instagram{background:linear-gradient(135deg,#833ab4 0%,#fd1d1d 50%,#fcb045 100%)}.sns-link.instagram:hover{background:linear-gradient(135deg,#7209b7 0%,#e91e63 50%,#f57c00 100%)}.sns-link.gidanyan{background:linear-gradient(135deg,#f6b042 0%,#e69500 100%)}.sns-link.gidanyan:hover{background:linear-gradient(135deg,#e69500 0%,#cc8400 100%)}.sns-icon{width:20px;height:20px;fill:currentColor}.navigation-section{background:linear-gradient(135deg,#f0f7ff 0%,#e3f2fd 100%)}.navigation-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;margin-top:1.5rem}.nav-card{position:relative;background:white;border-radius:1rem;padding:2rem;text-align:center;transition:all 0.3s ease;box-shadow:0 4px 12px rgba(15,76,129,0.08);border:2px solid transparent;text-decoration:none;display:block}.nav-card:hover{transform:translateY(-4px);box-shadow:0 12px 24px rgba(15,76,129,0.15);border-color:var(--primary);text-decoration:none}.nav-card-icon{font-size:3rem;margin-bottom:1rem;filter:drop-shadow(0 2px 4px rgba(15,76,129,0.2))}.nav-card h3{margin:0.5rem 0;color:var(--primary);font-size:1.4rem}.nav-card p{margin:0.5rem 0 1.5rem;color:var(--muted);font-size:0.95rem;line-height:1.6}.nav-arrow{display:inline-block;font-size:1.5rem;color:var(--secondary);font-weight:bold;transition:transform 0.3s ease}.nav-card:hover .nav-arrow{transform:translateX(5px)}.sns-feed-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem;margin-top:1.5rem}.sns-feed-card{background:linear-gradient(135deg,#ffffff 0%,#f9fafb 100%);border-radius:1rem;padding:2rem;box-shadow:0 8px 16px rgba(15,76,129,0.08);border:1px solid #e5e7eb;transition:all 0.3s ease}.sns-feed-card:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(15,76,129,0.12)}.sns-feed-header{display:flex;align-items:center;gap:0.75rem;margin-bottom:1rem}.sns-feed-icon{width:32px;height:32px}.sns-feed-card h3{margin:0;font-size:1.2rem;color:var(--text)}.sns-feed-card p{margin:0.75rem 0 1.5rem;line-height:1.7;color:var(--muted)}.sns-feed-card a:not(.button){color:var(--primary);font-weight:600}.sns-feed-card .button{width:100%;justify-content:center;margin-top:1rem}.pdf-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:1rem;margin:1.5rem 0}.pdf-viewer-container{margin-top:2rem;background:#f9fafb;padding:1rem;border-radius:0.75rem;box-shadow:0 4px 12px rgba(15,76,129,0.08)}.pdf-viewer-container iframe{display:block;width:100%;min-height:600px}@media (max-width:768px){.pdf-actions{flex-direction:column;align-items:stretch}.pdf-actions .button{width:100%;margin-right:0 !important}.pdf-viewer-container iframe{min-height:500px}.sns-links{flex-direction:column;gap:1rem;align-items:center}.sns-link{width:220px;justify-content:center}}.bus-route{display:inline-flex;align-items:center;justify-content:center;min-width:3rem;height:2rem;padding:0.1rem;margin:0 0.2rem;font-weight:700;font-size:0.9rem;border-radius:0.4rem;transition:all 0.2s ease;box-shadow:0 2px 4px rgba(0,0,0,0.1)}.bus-route.c-line{background:linear-gradient(135deg,#a855f7 0%,#7e22ce 100%);color:white;border:2px solid #6b21a8}.bus-route.c-line:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(168,85,247,0.4);background:linear-gradient(135deg,#9333ea 0%,#6b21a8 100%)}.bus-route.n-line{background:linear-gradient(135deg,#06b6d4 0%,#0891b2 100%);color:white;border:2px solid #0e7490}.bus-route.n-line:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(6,182,212,0.4);background:linear-gradient(135deg,#0891b2 0%,#0e7490 100%)}.bus-route.c72-seiryu{background:linear-gradient(135deg,#ef4444 0%,#dc2626 100%);color:white;border:2px solid #b91c1c}.bus-route.c72-seiryu:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(239,68,68,0.4);background:linear-gradient(135deg,#dc2626 0%,#b91c1c 100%)}.bus-routes-group{display:flex;flex-wrap:wrap;gap:0.2rem;align-items:center;margin:0.2rem 0}.route-description{font-weight:600;color:var(--primary);margin-right:0.5rem}@media (max-width:640px){.bus-route{min-width:2.5rem;height:1.8rem;font-size:0.8rem}.bus-routes-group{gap:0.3rem}.header-inner{flex-direction:column;align-items:flex-start}.header-logo{flex-direction:column;align-items:flex-start;gap:0.5rem}.committee-logo{height:40px}nav ul{flex-wrap:wrap}.hero{padding:2rem}.hero.hero-with-image{flex-direction:column;text-align:center}.hero-visual{max-width:100%;order:-1}.notice-item.with-image{flex-direction:column;text-align:center}.notice-image{flex:none;max-width:250px;margin:0 auto}.date-info{flex-direction:column;align-items:flex-start;gap:0.5rem}.venue-info{grid-template-columns:1fr;gap:1.5rem}.map-container iframe{height:200px}.countdown-section{padding:2rem 1rem}.countdown-display{font-size:1.8rem;padding:0.8rem;line-height:1.3}.countdown-unit{font-size:0.5em;margin-right:0.3em}.navigation-grid{grid-template-columns:1fr}.sns-feed-grid{grid-template-columns:1fr}.footer-content{grid-template-columns:1fr;gap:2rem;text-align:center}.footer-section{border-bottom:1px solid rgba(255,255,255,0.1);padding-bottom:1.5rem}.footer-section:last-child{border-bottom:none;padding-bottom:0}}.sponsors-credit{background:#f9fafb;padding:3rem 1rem;text-align:center}.sponsors-credit h2{color:var(--primary);margin-bottom:2rem;font-size:1.5rem}.sponsors-grid{display:flex;flex-direction:column;align-items:center;gap:3rem;max-width:1200px;margin:0 auto}.sponsor-tier{width:100%;display:flex;flex-direction:column;align-items:center;gap:1.5rem}.sponsor-tier h3{font-size:1rem;color:var(--muted);font-weight:600;letter-spacing:0.05em;text-transform:uppercase}.sponsor-logo-xlarge{max-width:400px;width:100%;height:auto;transition:transform 0.3s ease,opacity 0.3s ease}.sponsor-logo-xlarge:hover{transform:scale(1.05);opacity:0.9}.sponsor-logo-large{max-width:280px;width:100%;height:auto;transition:transform 0.3s ease,opacity 0.3s ease}.sponsor-logo-large:hover{transform:scale(1.05);opacity:0.9}.sponsor-logo-medium{max-width:200px;width:100%;height:auto;transition:transform 0.3s ease,opacity 0.3s ease}.sponsor-logo-medium:hover{transform:scale(1.05);opacity:0.9}.sponsor-text-links{display:flex;flex-wrap:wrap;justify-content:center;gap:1.5rem 2.5rem;margin-top:1rem}.sponsor-text-link{font-size:1.1rem;color:var(--primary);font-weight:600;text-decoration:none;transition:color 0.2s ease;position:relative}.sponsor-text-link::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--secondary);transition:width 0.3s ease}.sponsor-text-link:hover{color:var(--secondary)}.sponsor-text-link:hover::after{width:100%}@media (max-width:768px){.sponsors-credit{padding:2rem 1rem}.sponsor-logo-xlarge{max-width:280px}.sponsor-logo-large{max-width:200px}.sponsor-logo-medium{max-width:150px}.sponsor-text-links{flex-direction:column;gap:1rem;align-items:center}.sponsor-text-link{font-size:1rem}}